Headphone holder



FIG. 1 is a perspective view of the headphone holder in accordance with the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is an alternative perspective view of the headphone holder.

It is understood that the broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a headphone holder, as shown and described. 